利用氟离子选择性电极直接电位法测定了牙膏中的游离氟。
The content of free fluorine in toothpaste by potentiometry with a fluorine ion selective electrode is determined.
方法按照国家《 地方病防治项目技术方案》进行，水氟测定用氟离子选择性电极法。
Methods According to "The National Technical Scheme for Endemic Disease Control", the content of fluoride in drinking water was assassed by F-ion selective electrode.
应用氟离子选择性电极法对茶叶中氟含量进行了测定。同时，对影响茶叶中氟浸出的相关因素作了初步探讨。
Fluorine content of tea was studied by fluorine ion selectivity electrode and the relative factors which make influence to fluorine extraction were researched.
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